7 dimes is 10¢ per dime so it is 70¢ in total. I guess that is what you were talking about.
I had this problem for rsm too if you go there anyway the answer is 49 outside of the square root and the 3 is in the square root and then divided by 2.
check the picture below. You can just count the units off the grid.
You should try starting a conversation with him if you're in the same class/have a class together you can ask how he's liking the class. Don't straight up ask to be his friend that might make him confused. Work on it a little each day maybe even try to compliment him a few times. I hope this helpsss